DEVELOPMENT OF PNEUMATIC SOWING MACHINE SEEDER FOR AMARANTH LOW APPLICATION SOWING

Abstract

The purpose of the research is improving the quality of dispensing amaranth seeds small norms in the development of pneumatic sowing machine. Qualitative performance of seeder for small seeded crops depend on the sowing unit, as technical means for dosing and feeding the seed flow. Designed pneumatic seed metering device for dispensing seeds of small seeded crops seeding rates of 0.1-1.5 kg/ha. Novelty design of the sowing unit is confirmed by the patent of the Russian Federation for the invention №2228586. Laboratory studies have found that at values of air velocity at the inlet to the mixer V = 13.46 m/s and mounting height ejector device over the mixer h = 0.147 m observed the best uniformity of distribution of seeds in subejectorspace. The coefficient of variation of the distribution of seeds on the front of the seed-air flow amounted ν = 44.08%. The coefficient of variation of the distribution of intervals between plants along the row amounted in experimental seeders ν = 63.3% and the seeder SO-4.2 ν = 131%. Due to a better distribution of plants on the area of the field, the seed yield of green mass on plots sown with seed drill with pneumatic sowing machine was exceeded by 44 and 34.7% respectively, the yields from the control plots and averaged over the three years of 1.25 t/ha of seeds and 87.74 t/ha of green mass.